Extension tube clip



FIG. 1 is a side, top and front perspective view of an extension tube clip showing my new design;

FIG. 2 is a left side elevational view thereof, the side opposite being a mirror image;

FIGS. 3 and 4 are respectively top and bottom plan views thereof;

FIGS. 5 and 6 are respectively front and rear elevational views thereof; and

FIG. 7 is a sectional view of FIG. 3 showing more clearly internal details of the clip. 

The ornamental design for extension tube clip, as shown and described. 